De Broglie Waves

Front

What does the dual nature of light refer to?

Back

Light acts as waves and particles.

Front

What is the de Broglie wavelength of an electron with kinetic energy of 50.0 keV?

Back

5.49 × 10^-12 m

Front

According to the de Broglie hypothesis, how is the wavelength of a moving particle related to its momentum?

Back

The wavelength is inversely proportional to its momentum.

Front

What is the de Broglie wavelength of an electron accelerated through a potential difference of 40 V?

Back

1.9 × 10^-10 m

Front

What is the energy of a photon that has the same wavelength as a 12-eV electron?

Back

3.5 keV

Front

Define de Broglie wavelength.

Back

The wavelength associated with a moving particle, given by the formula λ = h/p, where h is Planck's constant and p is momentum.

Front

What is Planck's constant?

Back

Planck's constant (h) is 6.63 × 10^-34 J·s.

Front

How is momentum (p) defined for a particle?

Back

Momentum (p) is defined as the product of mass (m) and velocity (v), p = mv.

Front

What is the relationship between energy (E) and momentum (p) for a photon?

Back

E = pc, where c is the speed of light.

Front

What is the formula to calculate the kinetic energy (KE) of an electron?

Back

KE = eV, where e is the charge of the electron and V is the potential difference.